When three or more defending team players form a "wall," how far must all teammates of the kicker (attacking team) remain from the wall?

When three or more defenders form a wall during a free kick, the players on the opposing team (the attackers) are required to remain at least 1 yard away from the wall. This rule is established to ensure that the attacking players do not interfere with the wall's ability to block the free kick or distract the defenders.

Allowing attackers to stand too close to the wall could lead to unfair advantages or distractions for the defending team, as players could potentially attempt to break through or create disturbances. The 1-yard distance is a standard that ensures some space for both teams, allowing for a clear execution of the free kick without any immediate surrounding pressure from the attackers.

The other options do not align with the established rules regulating the distance required as they suggest either a distance that is too short or too long, which could disrupt the balance and fairness of the set piece play.